#nav{
    width: 300px;
    background: darkgrey;
}

.title{
    font-size: 18px;
    font-weight: bold;
    text-indent: 1em;
    line-height: 35px;
    /*颜色，图片，图片位置，平铺方式*/
    background: red url("../images/l.jpg") 270px 10px no-repeat;
}
/*ul li
list-style:
    none：去掉圆点
    circle：空心圆
    decimal：数字
    spuare：正方形
*/
ul{
    background: darkgrey;
}
ul li{
    height: 30px;
    list-style: none;
    text-indent: 1em;
    background-image: url("../images/r.jpg");
    background-repeat: no-repeat;
    background-position: 236px 2px;
}

a{
    text-decoration: none;
    font-size: 14px;
    color: black;
}
a:hover{
    color: orange;
    text-decoration: underline;
}